CN101611250B

CN101611250B - Tube-end butterfly metering and shutoff valve

Info

Publication number: CN101611250B
Application number: CN2008800050592A
Authority: CN
Inventors: B·T·布林克斯
Original assignee: Woodward Governor Co
Current assignee: Woodward Inc
Priority date: 2007-02-16
Filing date: 2008-02-04
Publication date: 2012-09-05
Anticipated expiration: 2028-02-04
Also published as: CA2675600A1; JP5457838B2; EP2118536A1; US7506858B2; WO2008100724A1; US20080197312A1; EP2118536B1; JP2010519466A; EP2118536A4; KR20090118039A; CN101611250A

Abstract

A butterfly valve comprising a valve body having a passage, a valve shaft assembly, a plate, and a tube is provided. The valve shaft assembly comprises first and second shaft portions in opposing spaced relation, an intermediate portion therebetween, and a support plate secured to the valve shaft assembly. The first and second shaft portions rotatably couple the valve shaft assembly to the valve body. The intermediate member forms a chamber in fluidic communication with the passage. The support plate is disposed within the chamber at a closed valve position approximately perpendicular to a direction of fluid flow through the passage. The plate is secured to the support plate and has an inner portion and a flange radially outward of the inner portion. The flange is directed away from the support plate.

Description

Tube-end butterfly metering and shutoff valve

Technical field

Present invention relates in general to valve, especially relate to fly valve.

Background technique

Traditional fly valve is a kind of flow control device that fluid flows through a segment pipe that is used to handle.Typical case's fly valve comprises hollow circle tube shell, flat circular plate and rotatable shaft.Said plate is arranged within the shell, is in the intermediate portion of cylindrical housing length, and is fixed in the bottom of rotatable shaft.The top of rotatable shaft is coupled in actuator.At run duration, the transmission of movement of actuator to said plate.When actuator moves, no matter from the direction that flows through valve perpendicular to fluid to being parallel to direction that fluid flows through valve Anywhere, said plate all rotatably is positioned within the shell.When said circular plate during perpendicular to fluid flow direction, valve cuts out, and fluid is limited to flow through valve.On the contrary, when said plate was parallel to fluid flow direction, valve was opened fully, and it is maximum that the fluid flow through valve reaches.Through between vertical position and parallel position, moving said plate, valve can partly be opened the fluid flow that is measured to provide.

Traditional fly valve or between said plate and flow path, have Spielpassung in order to avoid wearing and tearing, this causes high leak-down rate, perhaps between said plate and flow path, has to contact.Because the radial stiffness of said plate and shell is all higher, the low excessively fly valve of Spielpassung maybe the higher actuation force of needs, and all has at any point of contact and to block and/or the risk of high wear rate.The high wear rate of contact surface makes valve produce undesirable leakage in closed position.In order to change the plate that is worn and to prevent further leakage, remove valve shaft to be provided to the inlet of said plate.Changing the plate that is worn remove valve shaft normally effort and work consuming time, so possibly be a difficulty and very long process.

People also know, most of fly valves, the especially specified fly valve that is used for high workload pressure have ratio such as the lower a little flow of ball valve (is C _vRatio), because flow path what by said plate with the axle stopped.And for given application, low discharge needs bigger valve usually, and with regard to cost, free space and available actuation torque, this possibly not be practical.

In addition, the standard fly valve need move said plate with high actuation torque sometimes, particularly moves to open position from closed position.The reason that needs so high actuation torque is because for example high valve cuts out metal clamping stagnation (galling) between supporting force, said plate and the shell, when losing actuator power, valve is biased into the required high spring preload of closed position, high flow-induction moment of torsion, or the like.Owing to need high actuation torque, must adopt bigger, more the actuator of costliness comes open and close valve.

The standard fly valve has the flow channel that on both direction, extends to outside the plate.Therefore, the alteration of form of in order to reduce the flow-induction moment of torsion said plate and shaft assembly being done is limited in the position in the flow channel diameter when valve is in any position.These changes only provide the minimum minimizing of flow-induction moment of torsion, and can reduce the flow area that valve is opened fully.

Summary of the invention

Thereby visible, desirable is following fly valve, and this fly valve resistance to wears and leaks, the exemplary flow rate on following current and the adverse current both direction is provided and needs low actuation torque and mobile between opened and closed positions with respect to its size and size.The invention provides such fly valve.From the specification of the present invention that is provided here, advantage of the present invention and other inventive features will become obvious.

In one aspect, fly valve has valve body, valve shaft assembly, plate and the pipe that is provided with passage.The valve shaft assembly comprises the first axle part branch and intermediate portion between the second axle part branch, the first axle part branch and the second axle part branch and the dunnage that is fixed in the valve shaft assembly that is in relative and spaced relationship.First and second shaft portions rotatably are coupled valve shaft assembly and valve body.Intermediary element is formed with the chamber that is communicated with the passage fluid.In the valve closed position, dunnage is arranged on this chamber interior, and is approximately perpendicular to the fluid flow direction that flows through passage.Said plate is fixed in said dunnage.Said plate has flat interior part and the flange that is positioned at the part radially outer.Flange points to the direction of leaving dunnage.Said pipe is arranged in the passage, and originate in the position that links to each other with shell towards valve flow passage one end that separates with between centers, and extend near the position the shaft assembly center line, in this position, a part of frictional fit or the Spielpassung of said pipe and plate flange.

In yet another aspect, fly valve comprises valve body, valve gap, valve shaft assembly, plate and pipe.Valve body is formed with passage, valve cover hole and pit.Valve cover hole is transverse to passage, and becomes relatively and relation at interval with pit.Valve gap is arranged in the valve cover hole and comprises axis hole.Axis hole and pit are axially aligned.The valve shaft assembly comprises that the first axle part that is in relative and spaced relationship divides and the second axle part branch, intermediary element and dunnage.The first axle part branch rotatably extends in the axis hole, and the second axle part branch rotatably is positioned at pit.Intermediary element is arranged between first and second shaft portion, and has the chamber that runs through.In the valve closed position, dunnage is arranged on this chamber interior, and is approximately perpendicular to the fluid flow direction that flows through passage.Said plate is fixed in dunnage.Said plate has flat interior part and the flange that is positioned at flat part radially outer.Flange points to the direction of leaving dunnage.Said pipe is arranged in the passage, itself and passage frictional fit or be anchored on passage, and with at least a portion flange frictional fit.Equally, valve is shown in an open position but the appropriate section spinning in pipe of a circular portion of dunnage and said plate is interior, and can screw out pipe, so that valve is in the closed position.

Aspect another, the present invention provides a kind of fly valve shaft assembly and uses with the ball valve shell.The fly valve shaft assembly comprises the first axle part branch, the second axle part branch, intermediary element, dunnage and plate.The second axle part divides with the first axle part and is divided into relatively and relation at interval.Intermediary element is between first and second shaft portion, and it has the chamber that runs through.In the valve closed position, dunnage is arranged on this chamber interior, and is approximately perpendicular to the fluid flow direction that flows through passage.Said plate is fixed in dunnage.Said plate has flat interior part and the flange that is positioned at the part radially outer.Flange points to the direction of leaving dunnage.

In conjunction with accompanying drawing, it is more obvious that other aspects of the present invention, target and advantage will become from following specification.

Description of drawings

These accompanying drawings are incorporated into specification and form the part of specification, show several aspect of the present invention, and with specification, in order to explain principle of the present invention.In the accompanying drawings:

Fig. 1 is the side perspective view of instructing the partial cutaway of exemplary embodiment of the fly valve of formation to get according to the present invention;

Fig. 2 is the side perspective view that another partial cutaway of fly valve is got among Fig. 1, and fly valve is in the closed position;

Fig. 3 is configured in the shaft assembly that uses in the disc valve of Fig. 1 and the exploded view of plate;

Fig. 4 is the sectional view of the part of fly valve among Fig. 1, has given prominence to engaging of plate among the pipe that has flange and Fig. 3;

Fig. 5 is the rear view that the partial cutaway of fly valve is got among Fig. 1, and disc valve is shown in an open position;

Fig. 6 is the side elevation view of Fig. 3 Middle shaft assembly and plate, and wherein a chock or step engage with said plate, and is fixed in shaft assembly according to the present invention's instruction; With

Fig. 7 is that Fig. 6 Middle shaft assembly 7-7 roughly along the line cuts open the top cross-sectional view of getting, and shows chock or the step orientation with respect to shaft assembly and plate.

Fig. 8 is the rear view that the partial cutaway of fly valve is got among Fig. 1, increases the material of a solid slab and interpolation, in order to the flow gain effect of auxiliary wedge or step;

Fig. 9 is the side cross-sectional views of Fig. 8 Middle shaft assembly;

Figure 10 is the side cross-sectional views of Fig. 8 Middle shaft assembly opposite with Fig. 9;

Figure 11 is the front cross-sectional view of Fig. 8 Middle shaft assembly; With

Figure 12 is the rear view of Fig. 8 shaft assembly.

Though the present invention combines some preferred embodiment to describe, this is not that intention limit the invention to these embodiments.On the contrary, the intent of the present invention is to contain all replacements, improvement and the equivalent that is included within the subsidiary spirit and scope of the invention that claims limited.

Embodiment

Said disc valve can resistance to wear and leak, and its size provides the exemplary flow rate on following current and the adverse current both direction with size, and the low actuation torque of needs and mobile between opened and closed positions.

With reference to Fig. 1 and 2, fly valve 10 comprises valve body 12, valve shaft assembly 14, plate 16 and manages 18.Valve body 12 is preferred by high tenacity, the material of fluid impermeable forms basically, and said material for example is stainless steel, alloyed steel, aluminium, plastics, PVC (PVC) or the like.In various embodiments, valve body 12 can be one of thin slice shell, lug shell, flanged pin shell and double flange shell.

As shown in Figure 1, valve body 12 comprises the pipe joint component 20 on first end 22 that is positioned at disc valve 10 and is positioned at another pipe joint component 20 on second end 24.Pipe joint component 20 allows that usually the valve body 12 of fly valve 10 is fixed on the pipeline (not shown) and/or is placed to pipeline in alignment.As shown in the figure, pipe joint component 20 comprises circumferentially spaced apart and run through a plurality of holes 26 that this radial flange 28 forms around radial flange 28.Pipe joint component 20 is preferred and valve body 12 is integrally formed.It should be recognized by those skilled in the art that to use valve body 12 is attached to other apparatus and method miscellaneous on the pipeline.

Still with reference to Fig. 1, valve body 12 qualifications also comprise a passage 30.In an illustrated embodiment, passage 30 is columniform passage substantially, and it passes valve body 12, extends to second end 24 from first end 22 of disc valve 10.Passage 30 is configured to accommodate the fluid stream that navigates within wherein.According to the concrete application of fly valve 10, fluid can be gas, liquid or their mixture.Such gas and liquid can comprise for example gaseous fuel, liquid fuel, water or the like.

Valve body 12 also comprises pit 32 and valve cover hole 34.Pit 32 is formed in the valve body 12, is substantially cylindrical cavity.Pit 32 and valve cover hole 34 be substantially transverse to passage 30, and be in relative spaced relationship.Valve cover hole 34 passes valve body 12, thereby is occupied and/or fill by valve gap 36 substantially.Valve gap 36 for example can utilize, and screw member is fixed in the valve cover hole 34.Valve gap 36 comprises axis hole 38, and said axis hole 38 is substantially transverse to passage 30, and axially aligns with pit 32.

As Fig. 3 is clear show, valve shaft assembly 14 comprises that the first axle part divides 40, the second axle part divides 42, intermediary element 44 and dunnage 46.First and

second shaft portions

40,42 one-tenth relative spaced relationships, and axially align each other substantially.Again with reference to Fig. 1 and 2, the first axle part divides in 40 axis holes 38 that extend in the valve gap 36, and the second axle part divides 42 to be positioned at pit 32.The thin walled cylindrical sleeve bearing (not shown) of hollow is sleeved on in first and

second shaft portions

40,42 one or the two usually, makes this bearing between shaft portion and valve body 12.First and

second shaft portions

40,42 operationally engage with axis hole 38 and pit 32 respectively, make that valve shaft assembly 14 can be with respect to valve body 12 and passage 30 rotations.At this moment, the first axle part divides 40 can operationally be coupled with actuator 48.Actuator 48 can be, for example handle, motoring actuator, pneumatic actuator or the like.

Intermediary element 44 is substantially C shape or hemispheric material piece, between first and second shaft portion 40, be coupled between 42 and with them.As shown in Figure 1, similar ball is a part of alike in intermediary element 44 and the typical ball valve, but inequality.Intermediary element 44 is preferred integrally formed with first and second shaft portions 40,42.Intermediary element 44 is rotated with first and

second shaft portions

40,42 in valve body 12 inside.As shown in Figure 3, intermediary element 44 is formed with chamber 50 in shaft assembly 14.Chamber 50 is communicated with passage 30 fluids substantially.

Still referring to Fig. 3, shown dunnage 46 is placed in chamber 50 inside of intermediary element 44.In such structure, dunnage 46 is oriented in first and second shaft portions 40 substantially, between 42.Dunnage 46 preferred intermediary element 44 with next-door neighbour's first and

second shaft portions

40,42 are coupled.In one embodiment, dunnage 46 is supported by one or more support webs 52.Support webs 52 is extended between the front 56 of the dorsal part 54 of dunnage 46 and intermediary element 44, so that support structure to be provided.Preferably, dunnage 46 is all integrally formed with intermediary element 44 with support webs 52.

As shown in Figure 3 equally, dunnage 46 is flat substantially elements, and has irregularly shaped or polygonal part 58 and circular portion 60.As shown in the figure, polygonal part 58 is more longitudinally extended towards first and

second shaft portions

40,42 than circular portion 60.In other words, compare with polygonal part 58, circular portion 60 is by brachymemma a little, in valve shaft assembly 14, to form gap area 62.Dunnage 46 comprises a plurality of pits 64 that are formed in the front side 66.Pit 64 preferably is threaded, and makes them can receive and keep screw member (for example bolt, screw or the like).

Plate 16 is substantially circular element.As Fig. 4 is clear show, plate 16 has flat interior part 68, be positioned at flat part radially outer tapered thickness section 70 and be positioned at the flange 72 of the radially outer of tapered thickness section.As shown in the figure, flange 72 points to the direction away from dunnage 46 substantially.Flange 72 also can point to dunnage 46.Tapered thickness section 70 forms cavity 74 together with flange 72.In one embodiment, flange 72 comprises projection 76, and said projection 76 is extended around flange peripheral from the flange radially outward, and substantially with the center line coplane of first and second shaft portions 40,42.In one embodiment, projection 76 forms by being obedient to (compliant) material, for example polytetrafluoroethylene (PTFE) or elastomer.Flange 72 preferably can radially inside and radially outward deflection.In one embodiment, the rotation centerline coplane of the outer diameter flat of projection 76 and shaft assembly makes the diameter of shaft assembly center line bisection projection 76.The compliance of pipe can make the outer diameter flat of shaft assembly center line and projection 76 leave one section very little distance.In addition, the compliance of pipe also can make the second-class office of diameter of shaft assembly center line and projection 76 leave one section very little distance.These offset dimensions can be used for changing the moment that is caused at the pressure reduction of closed position fully by valve 10.

As shown in Figure 3, the flat interior part 68 of plate 16 comprises a plurality of holes 78.Hole 78 preferably with dunnage 46 in pit 64 align.Like this, threaded elements 80 can be passed hole 78, and screwed goes into pit 64, so that plate 16 is fixed in dunnage 46.When so fixedly, plate 16 is coaxial with dunnage 46 substantially.In one embodiment, the circular portion of dunnage 46 has the radius littler than plate 16 radiuses (that is, the periphery 82 of plate 16 extends radially outwardly from the periphery 84 of the circular portion of dunnage 46) substantially.And in one embodiment, plate 16 can be integrally formed each other with dunnage 46 (or other assemblies of valve shaft assembly 14).

Refer again to Fig. 1 and 2, pipe 18 is arranged within the passage 30 of valve body 12.Pipe 18 is the thin walled cylinder of hollow substantially.As shown in the figure, pipe 18 originates near the center line of shaft assembly 14, leaves plate 16 and first end 22 sensings and the extension of dunnage 46 towards valve body 12.Pipe 18 is with passage 30 frictional fit (being interference fit, press fit or the like) and/or be anchored on passage (for example, with valve body 12 one).In one embodiment, will remain on the end relative with the outward flange of pipe 18 one in the hollow ring on the outside diameter of passage, be installed in the passage 30 thereby will manage 18 with valve shaft assembly 14 through utilizing screwed.Like this, pipe 18 is fixed within the passage 30 of valve body 12.The pipe 18 also with at least a portion flange 72 and/or projection 76 frictional fit or Spielpassung.In one embodiment, the internal diameter that is sleeved on the tube end at least a portion flange 72 and/or the projection 76 has additional chamfering or radius 100 (see figure 4)s, so that flange 72 and/or projection 76 are not having to move through this tube end under the situation about damaging.

When valve 10 was positioned at open position shown in Figure 5 or is positioned at closed position shown in Figure 1, pipe 18 (or at least a portion pipe of next-door neighbour's flange 72) preferably can radially inside and radially outward deflection (that is, having compliance).So; When valve 10 is positioned at open position; Pipe 18 deflects into avette (for example oval) cross section transverse to the fluid flow direction that flows through passage, makes that the contact force between flange 72 and/or projection 76 and the pipe 18 reduces, and fluid flow direction is by 86 expressions of the direction arrow among Fig. 1.In addition, when valve 10 during in closed position, pipe 18 and flange 72 and/or projection 76 are in response to the pressure reduction at valve two ends, in the radial direction deflection.In one exemplary embodiment, radially being obedient to of pipe 18 equals radially being obedient to and/or being complementary with it of flange 71.Equally, these two parts can promote constant seal contact pressure, and need low actuation torque, even the pressure reduction at fly valve 10 two ends is when changing.

Has the ability of deflection because manage 18, so in various environment, can realize some benefit.For example, process circular and valve 10 partially opens or opens fully if manage 18, then manage 18 with plate 16 on flange 72 can deflect into oval shape, reduce contact pressure, thereby reduce wear rate.The another one example is, pipe 18 can manufacture slight ovalize or oval shape, and like this, when valve 10 was opened, pipe 18 can contact plate 16.But when valve 10 cut out, pipe 18 was forced the formation annular shape, and to engage with circular plate 16, as adopting circular pipe, valve 10 seals.

Plate 16 all can apply erosion resistance and/or resistant material or synthetic with pipe 18, for example, and the carbide coating of flame spraying, hard chromium plating or the like.When such erosion resistance and/or corrosion resistant substance are put on plate 16 and/or manage 18, can prolong the working life of parts.Therefore, plate 16 needn't frequent replacing as untreated plate and pipe with pipe 18.

As shown in Figure 1, pipe 18 can arrive via first end 22 of valve body 12 with plate 16 boths.So, if need more replace tubes 18 and/or plate 16, can at an easy rate they be taken out valve body 12, need not remove valve gap 36 from valve body.For example, the pipe joint 20 that is close to first end 22 can break away from the pipeline (not shown), to expose pipe 18 and plate 16.Through overcoming frictional fit and/or the secure component that pipe 18 is remained on the appropriate location, just can extract the pipe 18 that is not blocked out from passage 30.Thereafter, plate 16 is fixed in dunnage 46 used screw members 80 is outwards driven, so that these two isolation of components.Plate 16 separately then also can be pulled out from passage 30.When these parts that worn and torn were removed, new plate 16 can be fixed on the dunnage 46 with screw member 80, if desired, newly managed 18 and may be fitted in the passage 30 and on flange and/or the projection 76.

Be in operation, when fly valve 10 was in closed position shown in Figure 1, plate 16 was oriented in the passage 30 substantially, made plate perpendicular to by the represented fluid flow direction of direction arrow 86.In addition, flange 72 is preferred outstanding and extend in the pipe 18, and it is inner to make that projection 76 is positioned at pipe, and engages with pipe.In this configuration, projection 76 is seated on the pipe 18, to facilitate sealing.In closed position, fluid is prevented from and/or limits flowing through runner 30.

Utilize actuator 48, disc valve 10 can be changed between closed position and open position, and is as shown in Figure 5.Being coupled in the first axle part divides 40 actuator 48 preferably in the fully open position and rotate between the closed position fully and approximate greatly or slightly less than 90 degree.And when actuator 48 was handle, the position of handle was the state of indicating valve.For example, handle can be arranged to: when handle was parallel to valve body 12, fly valve 10 was positioned at open position, and when handle during perpendicular to valve body, fly valve is positioned at closed position.

For valve is in a fully open position, utilize actuator 48 that the circular portion 60 of dunnage 46 and the appropriate section of plate 16 are rotated in the pipe 18.Simultaneously, intermediary element 44 screws out from passage 30.So passage 30 is flow through on permission fluid edge direction forward or backwards.And plate 16, dunnage 46 and support webs 52 are parallel to the flow path orientation substantially, when disc valve 10 is in a fully open position, have only the thickness of these few components that the small cross sectional that hinders flow path is provided.Like this, minimum through the pressure drop of passage, and the maintenance of the circulation area of disc valve is higher.In addition, this high circulation area not only had been present in forward (from first end, 22 to second ends 24) but also had been present in reverse (from second end to first end).In one embodiment, forward and reverse flow is approximately equal.

Fluid flows through passage 30 when being in a fully open position (or partially opening the position) at disc valve 10, each in pipe 18 and the flange 72 can both be radially inwardly with the radially outward deflection, to respond various pressure and the active force that exists in the disc valve 10.Shown in preceding, process circular and valve 10 partially opens or opens fully if manage 18, then manage 18 with plate 16 on flange 72 can deflect into oval shape, reduce contact pressure, thereby reduce wear rate.Equally, manufacture a little near ellipse or oval shape if manage 18, then, when valve 10 is opened, pipe 18 will be not can contact plate 16, and when valve 10 cuts out, manage 18 and be forced the formation annular shape, to engage with circular plate 16.So valve 10 sealings are as adopting circular pipe.This makes more effectively meter fluid of fly valve 10.

In one embodiment, the first axle part of valve shaft assembly 14 divides 40 operationally to be coupled in a biasing element 88.In Fig. 2, described the reduced form of biasing element 88.Though above the biasing element shown in Fig. 2 88 is positioned at valve gap 36,, biasing element 88 can be arranged on along valve shaft assembly 14 Anywhere, and integrally formed with it.Biasing element 88 is so a kind of devices, and it provides biasing force to valve shaft assembly 88, makes fly valve 10 in specific environment, push closed position to.In one embodiment, preload bias element 88 (for example, spring) makes it to serve as the fail-safe device of fly valve 10.If actuator 48 runs out of steam, biasing element 88 forces fly valve 10 to get into closed position, flows through passage 30 to stop fluid.As selection, biasing element 88 also can promote fly valve 10 arrival fully open positions.

In one embodiment, like Fig. 6 and shown in Figure 7, a chock 90 is attached in the valve shaft assembly 14.Chock 90 is used for when valve opening is low, reducing circulation area, when valve is opened fully, still can reach same current global mechanism area simultaneously.Though what show is chock, it can take step or the like shape.In the specification below, chock will be used for describing this throttle mechanism.It should be recognized by those skilled in the art that other mechanisms that also can use except that chock,, realize similar function like step or the like.As shown in the figure, chock 90 is provided with against plate 16, and operationally is fixed in dunnage 46.Like this, the part of plate 16 is capped or blocks and can not see.Chock 90 comprises a plurality of holes 92, and like this, chock can be accommodated screw member 80 (referring to Fig. 3).When in screw member 80 is driven to, getting into the pit 64 of dunnage 46, chock 90 is forced with plate 16 and engages, and is fixed in dunnage 46.As shown in Figure 7 equally, chock 90 comprises recess 94, and said recess 94 prevents that the flange 72 on the plate 16 from contacting with each other with chock.

Chock 90 provides one or more benefits for fly valve 10.For example, because when actuator 48 beginning cut-off valves, chock 90 can begin to get into pipe 18 fast, so chock 90 allows measurement flow more exactly to cross the fluid of fly valve 10.Chock 90 has reduced the similar flow gain (, flow increases the ratio with valve opening) when in the closed position of valve 10 in addition.Notice that when valve was opened, because chock 90 is outside the end of pipe 18, flow path outwards moved around chock 90.The same with pipe 18 with plate 16, chock 90 can carry out scene (field) to be changed, and need not to remove valve gap 36 from valve body 12.

In yet another embodiment, plate 16 comprises the solid slab that does not have flange 72, and this solid slab is rigidity diametrically.Forward Fig. 8-12 now to, solid slab 110 has a lip 112.Lip 112 is preferably given prominence in pipe 18 and is extended in the pipe 18, and it is inner to make that lip 112 is positioned at pipe, and engages.In this configuration, lip 112 is seated on the pipe 18, to facilitate sealing.In closed position, fluid is prevented from and/or limits flowing through runner 30.In one embodiment, rotation centerline 114 coplanes (referring to Figure 10) of the outer rim plane of lip 112 and shaft assembly make shaft assembly center line 114 bisection lip edges.The compliance of pipe can make the shaft assembly center line 114 and the plane 116 of dunnage 46 leave one section very little distance.These offset dimensions can be used for changing by valve 10 moment that the pressure reduction on the valve 10 causes when the closed position fully.

In one embodiment, through adding material can assist or realize chock 90 partly to fill the chamber 50 in the intermediary element 44 flow gain function to shaft assembly.In another embodiment, through near the position the chock rather than the position of managing outside 18 diameters add material to shaft assembly, can assist or realize the flow gain function of chock 90.In yet another embodiment, through near the position the chock rather than the position of managing outside 18 diameters add material to shaft assembly, the amplitude that flow induces moment to reduce has surpassed traditional disc valve.In one embodiment, near the material at the position the chock is the arc extending portion 120 on the ectosome of intermediary element 44.

From preceding text, it should be recognized by those skilled in the art that with known valve and compare that fly valve 10 has tangible advantage.For example, because the radial compliance of the flange 72 on pipe 18 and the plate 16, fly valve 10 has low support moment.Owing to pipe 18 and radially being obedient in response to the pressure reduction on the valve 10 of flange 72 mate, it is very low that the leakage part on following current and the adverse current both direction keeps.And, through allowing pipe 18 deflections, reduced the wearing and tearing of pipe, especially when fly valve 10 vibrates on open position partially or completely to plate.In addition; Because only have the little obstruction cross-section area that is formed by thin support webs 52, plate 16 and dunnage 46 to be retained in the flow path, fly valve 10 all provides the circulation area higher than the high pressure disc valve of other known types on following current and adverse current both direction.

When valve 10 was in complete closed position, the interpolation on the surface on the shaft assembly 14 on the position outside the pipe 18 meaned to have the required lower actuation torque of actuation torque of valves known of similar size than switching.For given flow, high standard-sized sheet circulation area or Cv ratio allow to utilize less valve size, because therefore less valve size also needs lower actuation torque.Further, because pipe 18 is easy to carry out field replacement with plate 16, needn't remove valve gap 36, fly valve 10 is particularly useful for managing the application higher with the wear rate of plate, for example, and the application that measure corrosion or corrode process fluid.Preferably, both can apply the protection material that cost can be not too high pipe 18 and plate 16, and are processed by lower cost materials, so that can regularly replace them.The length of pipe 18 can enough be lacked, so that fly valve 10 can be assembled in sheet (wafer) the type shell.

Further, confessed as those skilled in the art, valve shaft assembly 14 is configured to make it can be installed in the master ball valve shell.In other words, only through the ball valve shell is carried out minimum change, valve shaft assembly 14 just can be retrofitted in the existing ball valve with pipe 18.Preferably, valve shaft assembly 14 has the hardness that strengthens than conventional valve, and for given circulation area, this allows fly valve 10 can be operated in than under the higher pressure of conventional valve.In addition, the contact force of hanging down between pipe 18 and the plate 16 allows to be operated under the higher temperature and metal stuck (galling) can not occur and kill.Further, at the regional area of the valve contact of closing, the lip-deep uninterrupted diameter of polishing pipe 18 and plate 16 allows the cut-off valve leak-down rate lower than classical dish-like shapes valve.

The term " one " that (particularly the context of claims in) below used in describing context of the present invention and " be somebody's turn to do " and similar word should be interpreted as encompasses singular and plural number both, only if statement or is based on context clearly on the contrary arranged in addition at this.Term " comprises ", " having ", " comprising " and " containing " be to be understood that into open term (that is, and the meaning be " including, but not limited to "), unless otherwise mentioned.Number range in this citation only is intended to fall into a kind of simplified way of each the independent value within this scope as representing one by one, only if at this statement is arranged in addition, each independent value is introduced in specification, just looks like to quote from one by one equally at this.All said methods can be carried out with any suitable order, only if at this statement or based on context clear and definite opposite is arranged in addition.Use and any and all examples of providing or exemplary language (for example, " such as ") only are intended to show better the present invention at this, not as limitation of the scope of the invention, only if statement is arranged in addition.Any language should be as putting into practice the necessary arbitrary restriction that does not propose the element of protection of the present invention in the specification.

Described the preferred embodiments of the present invention at this, comprised that the inventor is used for the best mode that embodiment of the present invention is known.Through reading top specification, the distortion of those preferred embodiments is conspicuous to those skilled in the art.The inventor hopes that experienced technician takes the circumstances into consideration to adopt such distortion, and the inventor hopes that the present invention is put into practice, only if in this special description.Therefore, allow, present invention resides in the whole changes and the equivalent of the theme quoted from these subsidiary claims according to the law that is suitable for.In addition, said elements the combination in any in might being out of shape all contain by the present invention, only if statement or based on context clear and definite opposite is arranged in addition at this.

Claims

1. fly valve, it comprises:

Valve body, said valve body has passage;

The valve shaft assembly; Said valve shaft assembly comprises that the first axle part that is in relative spaced relationship divides and the second axle part branch, be in the first axle part divide with the second axle part branch between intermediary element and the dunnage that is fixed in the valve shaft assembly; The first axle part divides and the second axle part branch rotatably is coupled valve shaft assembly and valve body; Intermediary element is formed with the chamber that is communicated with the passage fluid; In the valve closed position, dunnage is arranged on this chamber interior, and is approximately perpendicular to the fluid flow direction that flows through passage;

Plate, it is fixed in dunnage, part and the flange that is positioned at the part radially outer in said plate has, flange points to the direction of leaving dunnage; With

Pipe, said pipe is arranged in the passage;

Wherein, pipe and plate all have the radially deflection for following current and adverse current fuel pressure difference, and the radially deflection of pipe and flange approximately is equal to each other.

2. fly valve as claimed in claim 1; Wherein, said pipe originates in the position that links to each other with shell towards valve flow passage one end that separates with between centers, and extends near the position the valve shaft assembly center line; In this position, a part of frictional fit or the Spielpassung of pipe and plate.

3. fly valve as claimed in claim 1, wherein, said plate comprises and divides radially outward internally and be in the section that the thickness of flange inner radial phases down.

4. fly valve as claimed in claim 1, wherein, said plate can rotate about 90 degree fully between closed position and the fully open position.

5. fly valve as claimed in claim 1, wherein, the first axle part of valve shaft assembly branch and the second axle part branch, intermediary element and dunnage are integrally formed.

6. fly valve as claimed in claim 1, wherein, a circular portion of dunnage has the radius less than the plate radius.

7. fly valve as claimed in claim 1, wherein, the valve shaft assembly further comprises at least one support webs between dunnage and intermediary element, and said at least one support webs and valve shaft assembly are integrally formed.

8. fly valve as claimed in claim 1, wherein, said plate has the hole, and dunnage has threaded pit, and said plate runs through said hole and is fixed in dunnage by the inside screw member that gets into said threaded pit that drives through one.

9. fly valve as claimed in claim 1, wherein, said pipe is deflective, makes pipe have the oval cross section transverse to the fluid flow direction that flows through passage.

10. fly valve as claimed in claim 1, wherein, a throttle mechanism is fixed in the valve shaft assembly.

11. fly valve as claimed in claim 1, wherein, fly valve operationally is coupled in an actuator, and actuator is applicable to and between open position and closed position, moves fly valve.

12. fly valve as claimed in claim 1, wherein, fly valve operationally is coupled in a biasing element, and biasing element is by preload, when actuator runs out of steam, disc valve is moved to one of open position and closed position.

13. fly valve as claimed in claim 1, wherein, when fly valve was positioned at open position, fly valve had equal circulation area on following current and adverse current both direction.

14. fly valve as claimed in claim 1, wherein, at least one in said pipe and the plate is provided with coating.

15. fly valve as claimed in claim 1, wherein, when valve was in complete closed position, the valve shaft assembly had the material at the position outside the pipe diameter.

16. fly valve as claimed in claim 1, wherein, the valve shaft assembly has chamber that is arranged in the valve shaft component internal and the material that blocks a part of chamber.

17. fly valve as claimed in claim 1, wherein, said flange comprises a plate projection, the rotation centerline of axle and the outer diameter flat coplanar of plate projection.

18. fly valve as claimed in claim 1, wherein, said flange comprises a plate projection, the diameter of the rotation centerline bisection plate projection of axle.

19. fly valve as claimed in claim 1, wherein, said flange comprises a plate projection, the rotation centerline of axle not with the outer diameter flat coplanar of plate projection.

20. fly valve as claimed in claim 1, wherein, said flange comprises a plate projection, the do not halve diameter of plate projection of the rotation centerline of axle.

21. fly valve as claimed in claim 1, wherein, said flange is towards dunnage.

22. a fly valve, it comprises:

Valve body, said valve body is formed with passage, axis hole and pit, and axis hole is transverse to passage, and becomes relative spaced relationship with pit and axially align with it;

Valve shaft assembly, said valve shaft assembly comprise that the first axle part that is in relative spaced relationship divides and the second axle part branch, intermediary element and dunnage, and the first axle part branch rotatably extends in the said axis hole; The second axle part branch rotatably is positioned at pit; Intermediary element is arranged between the first axle part branch and the second axle part branch, and is formed with the chamber that is communicated with the passage fluid, in the valve closed position; Dunnage is arranged on this chamber interior, and is approximately perpendicular to the fluid flow direction that flows through passage;

Plate, it is fixed in said dunnage, part and the flange that is positioned at the part radially outer in said plate has, flange points to the direction of leaving dunnage; With

Pipe, said pipe is arranged in the passage, said pipe and passage frictional fit or be anchored on passage, and with the said flange frictional fit of at least a portion;

Wherein, a circular portion of dunnage and the appropriate section of said plate can spinning in pipe in so that valve is shown in an open position, and the appropriate section of the circular portion of dunnage and said plate can rotate to the position of Guan Yiduan, so that valve is in the closed position;

Wherein, said plate is fixed in dunnage through at least one screw member, said pipe and plate deflection radially equally on downbeam, also deflection radially equally on countercurrent direction.

23. fly valve as claimed in claim 22, wherein, needn't remove valve gap from valve body is replaceable said pipe and plate.

24. fly valve as claimed in claim 22, wherein, at least one in said pipe and the plate is provided with at least one in corrosion-inhibiting coating and the underseal.

25. fly valve as claimed in claim 22, wherein, an end of said pipe is close to the center line that said the first axle part divides and the second axle part divides and stops.

26. a fly valve shaft assembly that uses with the ball valve shell, said fly valve shaft assembly comprises:

The first axle part branch;

The second axle part branch, itself and the first axle part are divided into relative spaced relationship;

Intermediary element between the first axle part branch and the second axle part branch, this intermediary element has the chamber that runs through wherein;

Be arranged on the dunnage of said chamber interior, in the valve closed position, said dunnage is approximately perpendicular to the fluid flow direction that flows through passage;

Plate, it is fixed in said dunnage, part and the flange that is positioned at the part radially outer in said plate comprises; With

Pipe, said pipe is arranged in the passage;

Wherein, said pipe and plate deflection radially equally on downbeam, also deflection radially equally on countercurrent direction.

27. disc valve shaft assembly as claimed in claim 26, wherein, said flange points to and leaves a dunnage or a direction in the direction of dunnage.

28. fly valve shaft assembly as claimed in claim 27; Wherein, said flange comprises the projection that radially outward is outstanding, and said projection is extended around flange peripheral; And wherein, said pipe matches with at least a portion projection with a kind of mode in frictional fit and the Spielpassung.

29. fly valve shaft assembly as claimed in claim 27, wherein, the ball valve shell has passage, said pipe and at least a portion flange frictional fit or Spielpassung.

30. fly valve shaft assembly as claimed in claim 29, wherein, said pipe is cylindrical, and at least one in said dunnage and the plate is avette, and said pipe is deflective, makes pipe have the oval cross section transverse to the fluid flow direction that flows through passage.

31. fly valve shaft assembly as claimed in claim 29, wherein, during in not needing low cut-off valve actuation force or cutting off closely at least one, at least one in said pipe and the plate is being rigidity in the radial direction.

32. fly valve shaft assembly as claimed in claim 26, wherein, said plate and dunnage are integrally formed each other.

33. a fly valve, it comprises:

Valve body, said valve body has passage;

The valve shaft assembly; Said valve shaft assembly comprises that the first axle part that is in relative spaced relationship divides and the second axle part branch, be in the first axle part divide with the second axle part branch between intermediary element and the dunnage that is fixed in the valve shaft assembly; The first axle part divides and the second axle part branch rotatably is coupled valve shaft assembly and valve body; Said intermediary element is formed with the chamber that is communicated with the passage fluid; Said dunnage is arranged on this chamber interior, and in the valve closed position, said dunnage is approximately perpendicular to the fluid flow direction that flows through passage;

Plate, it is fixed in said dunnage, and said plate has the part of radial rigidity; With

Pipe, said pipe is arranged in the passage, pipe and at least a portion plate frictional fit or Spielpassung;